1 /*
2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.code;
27
28 import java.util.Collection;
29 import java.util.Collections;
30 import java.util.EnumSet;
31 import java.util.HashMap;
32 import java.util.LinkedHashMap;
33 import java.util.Map;
34
35 import javax.lang.model.element.ElementVisitor;
36
37 import com.sun.tools.javac.code.Scope.WriteableScope;
38 import com.sun.tools.javac.code.Source.Feature;
39 import com.sun.tools.javac.code.Symbol.ClassSymbol;
40 import com.sun.tools.javac.code.Symbol.Completer;
41 import com.sun.tools.javac.code.Symbol.CompletionFailure;
42 import com.sun.tools.javac.code.Symbol.MethodSymbol;
43 import com.sun.tools.javac.code.Symbol.ModuleSymbol;
44 import com.sun.tools.javac.code.Symbol.PackageSymbol;
45 import com.sun.tools.javac.code.Symbol.RootPackageSymbol;
46 import com.sun.tools.javac.code.Symbol.TypeSymbol;
47 import com.sun.tools.javac.code.Symbol.VarSymbol;
48 import com.sun.tools.javac.code.Type.BottomType;
49 import com.sun.tools.javac.code.Type.ClassType;
50 import com.sun.tools.javac.code.Type.ErrorType;
51 import com.sun.tools.javac.code.Type.JCPrimitiveType;
52 import com.sun.tools.javac.code.Type.JCVoidType;
53 import com.sun.tools.javac.code.Type.MethodType;
54 import com.sun.tools.javac.code.Type.UnknownType;
55 import com.sun.tools.javac.code.Types.UniqueType;
56 import com.sun.tools.javac.comp.Modules;
57 import com.sun.tools.javac.util.Assert;
58 import com.sun.tools.javac.util.Context;
59 import com.sun.tools.javac.util.Convert;
60 import com.sun.tools.javac.util.DefinedBy;
61 import com.sun.tools.javac.util.DefinedBy.Api;
62 import com.sun.tools.javac.util.Iterators;
63 import com.sun.tools.javac.util.JavacMessages;
64 import com.sun.tools.javac.util.List;
65 import com.sun.tools.javac.util.Name;
66 import com.sun.tools.javac.util.Names;
67
68 import static com.sun.tools.javac.code.Flags.*;
69 import static com.sun.tools.javac.code.Kinds.Kind.*;
70 import static com.sun.tools.javac.code.TypeTag.*;
71
72 /** A class that defines all predefined constants and operators
73 * as well as special classes such as java.lang.Object, which need
74 * to be known to the compiler. All symbols are held in instance
75 * fields. This makes it possible to work in multiple concurrent
76 * projects, which might use different class files for library classes.
77 *
78 * <p><b>This is NOT part of any supported API.
79 * If you write code that depends on this, you do so at your own risk.
80 * This code and its internal interfaces are subject to change or
81 * deletion without notice.</b>
82 */
83 public class Symtab {
84 /** The context key for the symbol table. */
85 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
86
87 /** Get the symbol table instance. */
88 public static Symtab instance(Context context) {
89 Symtab instance = context.get(symtabKey);
90 if (instance == null)
91 instance = new Symtab(context);
92 return instance;
93 }
94
95 /** Builtin types.
96 */
97 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
98 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
99 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
100 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
101 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
102 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
103 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
104 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
105 public final Type botType = new BottomType();
106 public final JCVoidType voidType = new JCVoidType();
107
108 private final Names names;
109 private final JavacMessages messages;
110 private final Completer initialCompleter;
111 private final Completer moduleCompleter;
112
113 /** A symbol for the unnamed module.
114 */
115 public final ModuleSymbol unnamedModule;
116
117 /** The error module.
118 */
119 public final ModuleSymbol errModule;
120
121 /** A symbol for no module, for use with -source 8 or less
122 */
123 public final ModuleSymbol noModule;
124
125 /** A symbol for the root package.
126 */
127 public final PackageSymbol rootPackage;
128
129 /** A symbol that stands for a missing symbol.
130 */
131 public final TypeSymbol noSymbol;
132
133 /** The error symbol.
134 */
135 public final ClassSymbol errSymbol;
136
137 /** The unknown symbol.
138 */
139 public final ClassSymbol unknownSymbol;
140
141 /** A value for the errType, with a originalType of noType */
142 public final Type errType;
143
144 /** A value for the unknown type. */
145 public final Type unknownType;
146
147 /** The builtin type of all arrays. */
148 public final ClassSymbol arrayClass;
149 public final MethodSymbol arrayCloneMethod;
150
151 /** VGJ: The (singleton) type of all bound types. */
152 public final ClassSymbol boundClass;
153
154 /** The builtin type of all methods. */
155 public final ClassSymbol methodClass;
156
157 /** A symbol for the java.base module.
158 */
159 public final ModuleSymbol java_base;
160
161 /** Predefined types.
162 */
163 public final Type objectType;
164 public final Type objectsType;
165 public final Type classType;
166 public final Type classLoaderType;
167 public final Type stringType;
168 public final Type stringBufferType;
169 public final Type stringBuilderType;
170 public final Type cloneableType;
171 public final Type serializableType;
172 public final Type serializedLambdaType;
173 public final Type varHandleType;
174 public final Type methodHandleType;
175 public final Type methodHandleLookupType;
176 public final Type methodTypeType;
177 public final Type nativeHeaderType;
178 public final Type throwableType;
179 public final Type errorType;
180 public final Type interruptedExceptionType;
181 public final Type illegalArgumentExceptionType;
182 public final Type exceptionType;
183 public final Type runtimeExceptionType;
184 public final Type classNotFoundExceptionType;
185 public final Type noClassDefFoundErrorType;
186 public final Type noSuchFieldErrorType;
187 public final Type assertionErrorType;
188 public final Type incompatibleClassChangeErrorType;
189 public final Type cloneNotSupportedExceptionType;
190 public final Type annotationType;
191 public final TypeSymbol enumSym;
192 public final Type listType;
193 public final Type collectionsType;
194 public final Type comparableType;
195 public final Type comparatorType;
196 public final Type arraysType;
197 public final Type iterableType;
198 public final Type iteratorType;
199 public final Type annotationTargetType;
200 public final Type overrideType;
201 public final Type retentionType;
202 public final Type deprecatedType;
203 public final Type suppressWarningsType;
204 public final Type supplierType;
205 public final Type inheritedType;
206 public final Type profileType;
207 public final Type proprietaryType;
208 public final Type systemType;
209 public final Type autoCloseableType;
210 public final Type trustMeType;
211 public final Type lambdaMetafactory;
212 public final Type stringConcatFactory;
213 public final Type valueBootstrapMethods;
214 public final Type repeatableType;
215 public final Type documentedType;
216 public final Type elementTypeType;
217 public final Type functionalInterfaceType;
218 public final Type valueBasedType;
219
220 /** The symbol representing the length field of an array.
221 */
222 public final VarSymbol lengthVar;
223
224 /** The symbol representing the final finalize method on enums */
225 public final MethodSymbol enumFinalFinalize;
226
227 /** The symbol representing the close method on TWR AutoCloseable type */
228 public final MethodSymbol autoCloseableClose;
229
230 /** The predefined type that belongs to a tag.
231 */
232 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
233
234 /** The name of the class that belongs to a basic type tag.
235 */
236 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
237
238 /** A hashtable containing the encountered top-level and member classes,
239 * indexed by flat names. The table does not contain local classes.
240 * It should be updated from the outside to reflect classes defined
241 * by compiled source files.
242 */
243 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
244
245 /** A hashtable containing the encountered packages.
246 * the table should be updated from outside to reflect packages defined
247 * by compiled source files.
248 */
249 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
250
251 /** A hashtable giving the encountered modules.
252 */
253 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
254
255 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>();
256
257 public VarSymbol getClassField(Type type, Types types) {
258 return classFields.computeIfAbsent(
259 new UniqueType(type, types), k -> {
260 Type arg = null;
261 if (type.getTag() == ARRAY || type.getTag() == CLASS)
262 arg = types.erasure(type);
263 else if (type.isPrimitiveOrVoid())
264 arg = types.boxedClass(type).type;
265 else
266 throw new AssertionError(type);
267
268 Type t = new ClassType(
269 classType.getEnclosingType(), List.of(arg), classType.tsym);
270 return new VarSymbol(
271 STATIC | PUBLIC | FINAL, names._class, t, type.tsym);
272 });
273 }
274
275 public void initType(Type type, ClassSymbol c) {
276 type.tsym = c;
277 typeOfTag[type.getTag().ordinal()] = type;
278 }
279
280 public void initType(Type type, String name) {
281 initType(
282 type,
283 new ClassSymbol(
284 PUBLIC, names.fromString(name), type, rootPackage));
285 }
286
287 public void initType(Type type, String name, String bname) {
288 initType(type, name);
289 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
290 }
291
292 /** The class symbol that owns all predefined symbols.
293 */
294 public final ClassSymbol predefClass;
295
296 /** Enter a class into symbol table.
297 * @param s The name of the class.
298 */
299 private Type enterClass(String s) {
300 return enterClass(java_base, names.fromString(s)).type;
301 }
302
303 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
304 final Completer completer = type.tsym.completer;
305 type.tsym.completer = new Completer() {
306 @Override
307 public void complete(Symbol sym) throws CompletionFailure {
308 try {
309 completer.complete(sym);
310 } catch (CompletionFailure e) {
311 sym.flags_field |= (PUBLIC | INTERFACE);
312 ((ClassType) sym.type).supertype_field = objectType;
313 }
314 }
315
316 @Override
317 public boolean isTerminal() {
318 return completer.isTerminal();
319 }
320 };
321 }
322
323 public void synthesizeBoxTypeIfMissing(final Type type) {
324 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
325 final Completer completer = sym.completer;
326 sym.completer = new Completer() {
327 @Override
328 public void complete(Symbol sym) throws CompletionFailure {
329 try {
330 completer.complete(sym);
331 } catch (CompletionFailure e) {
332 sym.flags_field |= PUBLIC;
333 ((ClassType) sym.type).supertype_field = objectType;
334 MethodSymbol boxMethod =
335 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
336 new MethodType(List.of(type), sym.type,
337 List.nil(), methodClass),
338 sym);
339 sym.members().enter(boxMethod);
340 MethodSymbol unboxMethod =
341 new MethodSymbol(PUBLIC,
342 type.tsym.name.append(names.Value), // x.intValue()
343 new MethodType(List.nil(), type,
344 List.nil(), methodClass),
345 sym);
346 sym.members().enter(unboxMethod);
347 }
348 }
349
350 @Override
351 public boolean isTerminal() {
352 return completer.isTerminal();
353 }
354 };
355 }
356
357 // Enter a synthetic class that is used to mark classes in ct.sym.
358 // This class does not have a class file.
359 private Type enterSyntheticAnnotation(String name) {
360 // for now, leave the module null, to prevent problems from synthesizing the
361 // existence of a class in any specific module, including noModule
362 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
363 ClassSymbol sym = (ClassSymbol)type.tsym;
364 sym.completer = Completer.NULL_COMPLETER;
365 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
366 sym.erasure_field = type;
367 sym.members_field = WriteableScope.create(sym);
368 type.typarams_field = List.nil();
369 type.allparams_field = List.nil();
370 type.supertype_field = annotationType;
371 type.interfaces_field = List.nil();
372 return type;
373 }
374
375 /** Constructor; enters all predefined identifiers and operators
376 * into symbol table.
377 */
378 protected Symtab(Context context) throws CompletionFailure {
379 context.put(symtabKey, this);
380
381 names = Names.instance(context);
382
383 // Create the unknown type
384 unknownType = new UnknownType();
385
386 messages = JavacMessages.instance(context);
387
388 MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context);
389
390 rootPackage = new RootPackageSymbol(names.empty, null, missingInfoHandler);
391
392 // create the basic builtin symbols
393 unnamedModule = new ModuleSymbol(names.empty, null) {
394 {
395 directives = List.nil();
396 exports = List.nil();
397 provides = List.nil();
398 uses = List.nil();
399 ModuleSymbol java_base = enterModule(names.java_base);
400 com.sun.tools.javac.code.Directive.RequiresDirective d =
401 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
402 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
403 requires = List.of(d);
404 }
405 @Override
406 public String toString() {
407 return messages.getLocalizedString("compiler.misc.unnamed.module");
408 }
409 };
410 addRootPackageFor(unnamedModule);
411 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
412
413 errModule = new ModuleSymbol(names.empty, null) {
414 {
415 directives = List.nil();
416 exports = List.nil();
417 provides = List.nil();
418 uses = List.nil();
419 ModuleSymbol java_base = enterModule(names.java_base);
420 com.sun.tools.javac.code.Directive.RequiresDirective d =
421 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
422 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
423 requires = List.of(d);
424 }
425 };
426 addRootPackageFor(errModule);
427
428 noModule = new ModuleSymbol(names.empty, null) {
429 @Override public boolean isNoModule() {
430 return true;
431 }
432 };
433 addRootPackageFor(noModule);
434
435 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
436 @Override @DefinedBy(Api.LANGUAGE_MODEL)
437 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
438 return v.visitUnknown(this, p);
439 }
440 };
441
442 // create the error symbols
443 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
444 errType = new ErrorType(errSymbol, Type.noType);
445
446 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
447 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
448 unknownSymbol.type = unknownType;
449
450 // initialize builtin types
451 initType(byteType, "byte", "Byte");
452 initType(shortType, "short", "Short");
453 initType(charType, "char", "Character");
454 initType(intType, "int", "Integer");
455 initType(longType, "long", "Long");
456 initType(floatType, "float", "Float");
457 initType(doubleType, "double", "Double");
458 initType(booleanType, "boolean", "Boolean");
459 initType(voidType, "void", "Void");
460 initType(botType, "<nulltype>");
461 initType(errType, errSymbol);
462 initType(unknownType, unknownSymbol);
463
464 // the builtin class of all arrays
465 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
466
467 // VGJ
468 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
469 boundClass.members_field = new Scope.ErrorScope(boundClass);
470
471 // the builtin class of all methods
472 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
473 methodClass.members_field = new Scope.ErrorScope(boundClass);
474
475 // Create class to hold all predefined constants and operations.
476 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
477 WriteableScope scope = WriteableScope.create(predefClass);
478 predefClass.members_field = scope;
479
480 // Get the initial completer for Symbols from the ClassFinder
481 initialCompleter = ClassFinder.instance(context).getCompleter();
482 rootPackage.members_field = WriteableScope.create(rootPackage);
483
484 // Enter symbols for basic types.
485 scope.enter(byteType.tsym);
486 scope.enter(shortType.tsym);
487 scope.enter(charType.tsym);
488 scope.enter(intType.tsym);
489 scope.enter(longType.tsym);
490 scope.enter(floatType.tsym);
491 scope.enter(doubleType.tsym);
492 scope.enter(booleanType.tsym);
493 scope.enter(errType.tsym);
494
495 // Enter symbol for the errSymbol
496 scope.enter(errSymbol);
497
498 Source source = Source.instance(context);
499 if (Feature.MODULES.allowedInSource(source)) {
500 java_base = enterModule(names.java_base);
501 //avoid completing java.base during the Symtab initialization
502 java_base.completer = Completer.NULL_COMPLETER;
503 java_base.visiblePackages = Collections.emptyMap();
504 } else {
505 java_base = noModule;
506 }
507
508 // Get the initial completer for ModuleSymbols from Modules
509 moduleCompleter = Modules.instance(context).getCompleter();
510
511 // Enter predefined classes. All are assumed to be in the java.base module.
512 objectType = enterClass("java.lang.Object");
513 objectsType = enterClass("java.util.Objects");
514 classType = enterClass("java.lang.Class");
515 stringType = enterClass("java.lang.String");
516 stringBufferType = enterClass("java.lang.StringBuffer");
517 stringBuilderType = enterClass("java.lang.StringBuilder");
518 cloneableType = enterClass("java.lang.Cloneable");
519 throwableType = enterClass("java.lang.Throwable");
520 serializableType = enterClass("java.io.Serializable");
521 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
522 varHandleType = enterClass("java.lang.invoke.VarHandle");
523 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
524 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
525 methodTypeType = enterClass("java.lang.invoke.MethodType");
526 errorType = enterClass("java.lang.Error");
527 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
528 interruptedExceptionType = enterClass("java.lang.InterruptedException");
529 exceptionType = enterClass("java.lang.Exception");
530 runtimeExceptionType = enterClass("java.lang.RuntimeException");
531 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
532 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
533 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
534 assertionErrorType = enterClass("java.lang.AssertionError");
535 incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError");
536 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
537 annotationType = enterClass("java.lang.annotation.Annotation");
538 classLoaderType = enterClass("java.lang.ClassLoader");
539 enumSym = enterClass(java_base, names.java_lang_Enum);
540 enumFinalFinalize =
541 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
542 names.finalize,
543 new MethodType(List.nil(), voidType,
544 List.nil(), methodClass),
545 enumSym);
546 listType = enterClass("java.util.List");
547 collectionsType = enterClass("java.util.Collections");
548 comparableType = enterClass("java.lang.Comparable");
549 comparatorType = enterClass("java.util.Comparator");
550 arraysType = enterClass("java.util.Arrays");
551 iterableType = enterClass("java.lang.Iterable");
552 iteratorType = enterClass("java.util.Iterator");
553 annotationTargetType = enterClass("java.lang.annotation.Target");
554 overrideType = enterClass("java.lang.Override");
555 retentionType = enterClass("java.lang.annotation.Retention");
556 deprecatedType = enterClass("java.lang.Deprecated");
557 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
558 supplierType = enterClass("java.util.function.Supplier");
559 inheritedType = enterClass("java.lang.annotation.Inherited");
560 repeatableType = enterClass("java.lang.annotation.Repeatable");
561 documentedType = enterClass("java.lang.annotation.Documented");
562 elementTypeType = enterClass("java.lang.annotation.ElementType");
563 systemType = enterClass("java.lang.System");
564 autoCloseableType = enterClass("java.lang.AutoCloseable");
565 autoCloseableClose = new MethodSymbol(PUBLIC,
566 names.close,
567 new MethodType(List.nil(), voidType,
568 List.of(exceptionType), methodClass),
569 autoCloseableType.tsym);
570 trustMeType = enterClass("java.lang.SafeVarargs");
571 nativeHeaderType = enterClass("java.lang.annotation.Native");
572 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
573 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
574 valueBootstrapMethods = enterClass("java.lang.invoke.ValueBootstrapMethods");
575 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
576 valueBasedType = enterClass("java.lang.ValueBased");
577
578 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
579 synthesizeEmptyInterfaceIfMissing(cloneableType);
580 synthesizeEmptyInterfaceIfMissing(serializableType);
581 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
582 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
583 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
584 synthesizeBoxTypeIfMissing(doubleType);
585 synthesizeBoxTypeIfMissing(floatType);
586 synthesizeBoxTypeIfMissing(voidType);
587
588 // Enter a synthetic class that is used to mark internal
589 // proprietary classes in ct.sym. This class does not have a
590 // class file.
591 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
592
593 // Enter a synthetic class that is used to provide profile info for
594 // classes in ct.sym. This class does not have a class file.
595 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
596 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
597 profileType.tsym.members().enter(m);
598
599 // Enter a class for arrays.
600 // The class implements java.lang.Cloneable and java.io.Serializable.
601 // It has a final length field and a clone method.
602 ClassType arrayClassType = (ClassType)arrayClass.type;
603 arrayClassType.supertype_field = objectType;
604 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
605 arrayClass.members_field = WriteableScope.create(arrayClass);
606 lengthVar = new VarSymbol(
607 PUBLIC | FINAL,
608 names.length,
609 intType,
610 arrayClass);
611 arrayClass.members().enter(lengthVar);
612 arrayCloneMethod = new MethodSymbol(
613 PUBLIC,
614 names.clone,
615 new MethodType(List.nil(), objectType,
616 List.nil(), methodClass),
617 arrayClass);
618 arrayClass.members().enter(arrayCloneMethod);
619
620 if (java_base != noModule)
621 java_base.completer = moduleCompleter::complete; //bootstrap issues
622
623 }
624
625 /** Define a new class given its name and owner.
626 */
627 public ClassSymbol defineClass(Name name, Symbol owner) {
628 ClassSymbol c = new ClassSymbol(0, name, owner);
629 c.completer = initialCompleter;
630 return c;
631 }
632
633 /** Create a new toplevel or member class symbol with given name
634 * and owner and enter in `classes' unless already there.
635 */
636 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
637 Assert.checkNonNull(msym);
638 Name flatname = TypeSymbol.formFlatName(name, owner);
639 ClassSymbol c = getClass(msym, flatname);
640 if (c == null) {
641 c = defineClass(name, owner);
642 doEnterClass(msym, c);
643 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
644 // reassign fields of classes that might have been loaded with
645 // their flat names.
646 c.owner.members().remove(c);
647 c.name = name;
648 c.owner = owner;
649 c.fullname = ClassSymbol.formFullName(name, owner);
650 }
651 return c;
652 }
653
654 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
655 Assert.checkNonNull(msym, flatName::toString);
656 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
657 }
658
659 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
660 Assert.checkNonNull(msym);
661
662 if (flatName.isEmpty()) {
663 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
664 return msym.unnamedPackage;
665 }
666
667 if (msym == noModule) {
668 return enterPackage(msym, flatName);
669 }
670
671 msym.complete();
672
673 PackageSymbol pack;
674
675 pack = msym.visiblePackages.get(flatName);
676
677 if (pack != null)
678 return pack;
679
680 pack = getPackage(msym, flatName);
681
682 if (pack != null && pack.exists())
683 return pack;
684
685 boolean dependsOnUnnamed = msym.requires != null &&
686 msym.requires.stream()
687 .map(rd -> rd.module)
688 .anyMatch(mod -> mod == unnamedModule);
689
690 if (dependsOnUnnamed) {
691 //msyms depends on the unnamed module, for which we generally don't know
692 //the list of packages it "exports" ahead of time. So try to lookup the package in the
693 //current module, and in the unnamed module and see if it exists in one of them
694 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
695
696 if (unnamedPack != null && unnamedPack.exists()) {
697 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
698 return unnamedPack;
699 }
700
701 pack = enterPackage(msym, flatName);
702 pack.complete();
703 if (pack.exists())
704 return pack;
705
706 unnamedPack = enterPackage(unnamedModule, flatName);
707 unnamedPack.complete();
708 if (unnamedPack.exists()) {
709 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
710 return unnamedPack;
711 }
712
713 return pack;
714 }
715
716 return enterPackage(msym, flatName);
717 }
718
719 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
720
721 public void removeClass(ModuleSymbol msym, Name flatName) {
722 classes.getOrDefault(flatName, EMPTY).remove(msym);
723 }
724
725 public Iterable<ClassSymbol> getAllClasses() {
726 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
727 }
728
729 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
730 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
731 }
732
733 /** Create a new member or toplevel class symbol with given flat name
734 * and enter in `classes' unless already there.
735 */
736 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
737 Assert.checkNonNull(msym);
738 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
739 Assert.checkNonNull(ps);
740 Assert.checkNonNull(ps.modle);
741 ClassSymbol c = getClass(ps.modle, flatname);
742 if (c == null) {
743 c = defineClass(Convert.shortName(flatname), ps);
744 doEnterClass(ps.modle, c);
745 return c;
746 } else
747 return c;
748 }
749
750 /** Check to see if a package exists, given its fully qualified name.
751 */
752 public boolean packageExists(ModuleSymbol msym, Name fullname) {
753 Assert.checkNonNull(msym);
754 return lookupPackage(msym, fullname).exists();
755 }
756
757 /** Make a package, given its fully qualified name.
758 */
759 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
760 Assert.checkNonNull(currModule);
761 PackageSymbol p = getPackage(currModule, fullname);
762 if (p == null) {
763 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
764 p = new PackageSymbol(
765 Convert.shortName(fullname),
766 enterPackage(currModule, Convert.packagePart(fullname)));
767 p.completer = initialCompleter;
768 p.modle = currModule;
769 doEnterPackage(currModule, p);
770 }
771 return p;
772 }
773
774 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
775 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
776 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
777 }
778
779 private void addRootPackageFor(ModuleSymbol module) {
780 doEnterPackage(module, rootPackage);
781 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
782 @Override
783 public String toString() {
784 return messages.getLocalizedString("compiler.misc.unnamed.package");
785 }
786 };
787 unnamedPackage.modle = module;
788 //we cannot use a method reference below, as initialCompleter might be null now
789 unnamedPackage.completer = s -> initialCompleter.complete(s);
790 module.unnamedPackage = unnamedPackage;
791 }
792
793 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
794 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
795 }
796
797 public ModuleSymbol enterModule(Name name) {
798 ModuleSymbol msym = modules.get(name);
799 if (msym == null) {
800 msym = ModuleSymbol.create(name, names.module_info);
801 addRootPackageFor(msym);
802 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
803 modules.put(name, msym);
804 }
805 return msym;
806 }
807
808 public ModuleSymbol getModule(Name name) {
809 return modules.get(name);
810 }
811
812 //temporary:
813 public ModuleSymbol inferModule(Name packageName) {
814 if (packageName.isEmpty())
815 return java_base == noModule ? noModule : unnamedModule;//!
816
817 ModuleSymbol msym = null;
818 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
819 if (map == null)
820 return null;
821 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
822 if (!e.getValue().members().isEmpty()) {
823 if (msym == null) {
824 msym = e.getKey();
825 } else {
826 return null;
827 }
828 }
829 }
830 return msym;
831 }
832
833 public List<ModuleSymbol> listPackageModules(Name packageName) {
834 if (packageName.isEmpty())
835 return List.nil();
836
837 List<ModuleSymbol> result = List.nil();
838 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
839 if (map != null) {
840 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
841 if (!e.getValue().members().isEmpty()) {
842 result = result.prepend(e.getKey());
843 }
844 }
845 }
846 return result;
847 }
848
849 public Collection<ModuleSymbol> getAllModules() {
850 return modules.values();
851 }
852
853 public Iterable<ClassSymbol> getClassesForName(Name candidate) {
854 return classes.getOrDefault(candidate, Collections.emptyMap()).values();
855 }
856
857 public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
858 return packages.getOrDefault(candidate, Collections.emptyMap()).values();
859 }
860 }